Ok, It's been asked for so I am going to start the ball rolling. Post your experience, ideas, results, queries with regards to installing the FCR flat slide pumper carby on your DR650se. Here's mine. An ebay purchase off an '04 YFZ450 quad. It's a 39mm FCR MX and had the features I wanted including the ability to retain the DR650s stock push pull throttle cables. I mostly followed the ledgendary mxrob's FCR MX conversion which can be found here: http://mxrob.com/mxrob_007.htm Under the throttle cover, the pulley has the slot for the push cable but the housing is blank need to be drilled and tapped. Using a 5mm drill bit, I drilled a hole through the housing and then tapped it with a 6mm x 1 mm tap. I then cut a slot with a cutting wheel and dremel to beable to slide the cable in place. I followed mxrobs cable adjustment procedure which worked pretty well. The only other major adaption was to have an airboot adaptor made up which I had a local engineering shop make up for me from aluminium to dimesions of 54.5mm ID x 58.5mm OD x 26mm long. I then used JB weld to glue/seal the adaptor to the carbys airbox side. I decided not to drill into the carby to install a vaccum port, instead opting for a raptor fuel tap which is gravity feed. Altough inititially I just ran the standard fuelcock on prime until I got the Raptor fuelcock to instal. The carby was east to install. First you need to undo your airbox so it floats around and can be moved the make way for the carby. Install the engine side first and a bit of silicone lube on the intake manifold helps. One in place in the intake manifold and the clamp has been tightened, work the airbox boot into place and then bolt your airbox back in to place. Seen below installed but late added an inline filter to fuel line. I started out with mxrobs recommended jetting and needle but after some trial and error as well as advice from DRsteve and BergDonk, I am down to these settings. 160 main jet 45 pilot jet 85 pilot air jet 85 starter jet 35 leak jet NCVT needle on 2.5 Fuel screw 2.25 turns out So far so good, I have sorted the backfiring issue I initially had and idles pretty close. I am still playing with the fuel screw adjustment to fine tune things. Do yourself a favour and get a R&D flexible fuel screw. makes fine tuning so much easier and less risk of it backing/falling out.